Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/third_party/rust/scroll/examples/data_ctx.rs b/third_party/rust/scroll/examples/data_ctx.rs
new file mode 100644
index 0000000000..a8e5652666
--- /dev/null
+++ b/third_party/rust/scroll/examples/data_ctx.rs
@@ -0,0 +1,25 @@
+use scroll::{ctx, Endian, Pread, BE};
+
+#[derive(Debug)]
+struct Data<'a> {
+    name: &'a str,
+    id: u32,
+}
+
+impl<'a> ctx::TryFromCtx<'a, Endian> for Data<'a> {
+    type Error = scroll::Error;
+    fn try_from_ctx (src: &'a [u8], endian: Endian)
+                     -> Result<(Self, usize), Self::Error> {
+        let name = src.pread::<&'a str>(0)?;
+        let id = src.pread_with(name.len()+1, endian)?;
+        Ok((Data { name: name, id: id }, name.len()+4))
+    }
+}
+
+fn main() {
+    let bytes = b"UserName\x00\x01\x02\x03\x04";
+    let data = bytes.pread_with::<Data>(0, BE).unwrap();
+    assert_eq!(data.id, 0x01020304);
+    assert_eq!(data.name.to_string(), "UserName".to_string());
+    println!("Data: {:?}", &data);
+}